As many of you know, there aren't a lot of resources on this eGPU and lots of misconceptions as far as I can find. So without further adeu here is how to get it to work flawlessly on the latest and greatest macbook pro on sierra.

Pre-requisite:

Make sure you have upgraded to 10.12.4 (released yesterday as of this guide)

e. after plugging in ROG XGS 2 for the first time wait a good minute or two before touching anything so it can be detected correctly by the hot swap tool from asus. it should say: no gpu detected, XG Station 2 is ready to attached. or something along those lines.